using UnityEngine;
using System.Collections;
using UnityEngine.AI;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class GameControl : MonoBehaviour 
{
	public static GameControl instance;         //A reference to our game control script so we can access it statically.
	public Text scoreText;                      //A reference to the UI text component that displays the player's score.
	public GameObject gameOvertext;             //A reference to the object that displays the text which appears when the player dies.

	public int score { get; private set; }                      //The player's score.
	public bool gameOver = false;               //Is the game over?
	public float scrollSpeed = -1.5f;


	void Awake()
	{
		//If we don't currently have a game control...
		if (instance == null)
			//...set this one to be it...
			instance = this;
		//...otherwise...
		else if(instance != this)
			//...destroy this one because it is a duplicate.
			Destroy (gameObject);
	}

	void Update()
	{
		//If the game is over and the player has pressed some input...
		if (gameOver && Input.GetMouseButtonDown(0)) 
		{
			//...reload the current scene.
			SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
		}
	}

	public void BirdScored()
	{
		//The bird can't score if the game is over.
		if (gameOver)
			return;
		//If the game is not over, increase the score...
		score++;

		if (scoreText != null)
		{
			//...and adjust the score text.
			scoreText.text = "Score: " + score.ToString();
		}
	}

	public void BirdDied()
	{
		//Activate the game over text.
		gameOvertext.SetActive (true);
		//Set the game to be over.
		gameOver = true;
	}
}